package com.cch.httpserver.ex01;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * Description:
 * Author: Hank
 * Date: 2018/8/5 23:04
 */

public class Response {
    private static  final int BUFFER_SIZE = 1024;
    Request request;
    OutputStream output;

    public Response(OutputStream output) {
        this.output = output;
    }

    public Request getRequest() {
        return request;
    }

    public void setRequest(Request request) {
        this.request = request;
    }

    public void sendStaticResource()throws IOException{
        byte[] bytes = new byte[BUFFER_SIZE];
        FileInputStream fis = null;
        try {

            if(request.getUri()==null){
                errWrite();
                return;
            }
            File file = new File(HttpServer.WEB_ROOT, request.getUri());
            if(file.exists()){
                fis = new FileInputStream(file);
                int ch = fis.read(bytes,0,BUFFER_SIZE);
                String result ="HTTP/1.1 200 OK\r\n" +
                        "Content-Type: text/html;charset=UTF-8\r\n" +
                        "\r\n";
                output.write(result.getBytes());
                while(ch!= -1){
                    output.write(bytes,0,ch);
                    ch = fis.read(bytes,0,BUFFER_SIZE);
                }
                output.flush();
            }else{
                errWrite();
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(fis!=null){
                fis.close();
            }
        }
    }

    private void errWrite() throws IOException {
        String errMessage="HTTP/1.1 404 File Not Found\r\n"+
                "Content-type: text/html\r\n"+
                "Content-length: 23\r\n"+
                "\r\n"+
                "<h1>File Not Found</h1>";
        output.write(errMessage.getBytes());
        System.out.println("not found");
    }
}
